This machine is very good, and it is worth the money. 3700 is estimated to be dangerous, and 3800 should be fine. It depends on your eloquence.
In addition, pay more attention to check the machine:
The seal is normal, which basically means a new machine (the most critical step is that a good beginning is half the battle)
First of all, see if the seal has been passive ~
Some machines have been opened with a hair dryer (that is, after the prototype is put into the original packaging, the seal is restored)
Traces are sometimes hard to see ~
But what has been opened is open after all ~
Take a closer look at whether the tape at the seal is consistent with the traces pasted when the first box was sealed at the factory ~
If it doesn't conform, it must be tricky (kraft paper packaging is sometimes better, because it is easy to break the kraft paper on the surface when Kaifeng is used as a prototype, so look carefully)
And whether there is dust, fingerprints, foreign objects and the like inside the tape ~
-The following is a copy:)
First, unpacking-how to judge whether JS brought me a new machine?
Many users and friends don't like unopened machines when buying notebooks, mainly because they are worried about repairing the machines or being tampered with by dealers and replacing accessories. But in fact, unopened notebooks are often encountered, such as prototypes that have only been placed for a few days, such as just being opened for other users to see the goods, and so on. These conditions do not mean that there is something wrong with the machine, and it is a machine that can be purchased with confidence. And the books in those well-sealed boxes are not necessarily unopened, because a ram can completely solve the sealing on the outer packaging of books without leaving any traces. So when you buy a notebook, you should buy a new one, but it doesn't mean that a notebook with no seal on it must be a new one, nor does it mean that a notebook that has been unpacked can't be bought. The key is to see if the notebook is a new machine. If your laptop is new, here are some tips to tell you:
1, look at the serial number. Most notebooks should have the same serial number on the body and battery. If the serial number of the battery is different from the serial number of the host, it is very likely that the laptop has been replaced. In addition, when purchasing foreign brand notebook computer products, whether the serial number of the fuselage is consistent with the battery and the outer packaging is a very important basis for testing whether the products are parallel imports, because foreign parallel notebooks do not enjoy the warranty in China.
2, look at the anti-theft lock hole. If there are fingerprints, it means that the notebook anti-theft lock has been inserted, and it is likely to be a prototype;
3. Look at this foot. If it is worn and dirty, it means it has been used, and the workbench on the production line is not so dirty;
4. Look at the cooling fan. If there is thin dust on the fan blade, it means that it has been used for more than a week;
5. Look at the date of production. Notebooks made three months ago are still on the market, so pay attention. The sales of electronic products are very fast, and it is impossible to keep a cost in the channel for so long.
6. Look at the keyboard. The keyboard of the new notebook is clean, but it won't glow. There will be dust in the gap of used notebook keyboard, and several commonly used keys will be polished;
7. Look at these screws. Let's not talk about this, shall we? Have the screws been removed? Then turn around and go!
8. Look at the gap. Generally, it is difficult to deal with the cracks in refurbished notebooks, such as the small cracks between AB faces of notebook screens, such as the cracks in optical drives, and even the interface between modems and PCMCIA cards. If you can find the dust, you can be sure that it has been put in the prototype and is not sealed. What? Also found absorbent cotton silk for wiping notebooks? Do I have to ask what to do?
In short, whether the notebook is a new machine or not cannot be generalized by whether the outer packaging box has been opened. It is not necessarily a good notebook that has been opened. On the contrary, the prototype is generally the most reliable notebook. This is a well-packaged book, so be careful to identify it. The most important thing in choosing is caution.
Second, the bad point-how much is more?
A good tool for detecting screen bad spots
LCD screen, the biggest headache when buying a notebook is the bad point. After all, no one wants to buy a new notebook with several bright spots, right? But almost no manufacturer promises that there are no bad points. Among notebook manufacturers, only ASUS promises no bright spots, but you can go to ASUS's forum to have a look. It's just a word game. It's too dark to hold water! Moreover, they call the color point a color point, not a bright spot, and there is no guarantee, so it is really hard to say what the bright spot is according to this standard.
The bad point problem of LCD has long plagued the LCD industry. Due to the manufacturing technology itself, it is difficult to avoid the bad spots of LCD, but how many bad spots are normal? At present, LCD manufacturers have not given the statement that how many bad spots are normal. In fact, the appearance of bad spots is that a single crystal of LCD is not working properly, which may be a different defect of red, blue and green.
The root of the bad point lies in production, and it is prevarication to answer the problems in transit or after long-term use. Because the bad spots are doomed at the moment when the LCD crystal is formed, but some of them do not appear at the factory, or some problems are not serious, and will gradually become dark spots (dark light) after a period of use. In other words, there is little possibility of producing bad spots the day after tomorrow. So buy a bad notebook and don't worry about the spread of bad points.
About the bad points of LCD screen, it is really a very helpless topic. Generally speaking, when buying a notebook, the LCD screen has three bad points, especially in area A, so you can refuse to buy it. When choosing a notebook, I suggest you bring some screen testing software to test the screen in detail. Be sure to choose carefully before buying, so as not to bring unnecessary trouble in the future.
Third, the fan-should it turn?
The cooling tool of notebook computer-fan
The fan of a notebook computer is different from that of a desktop computer, and it is controlled by the temperature of the notebook computer (except for notebooks with individual desktop CPU). In other words, when the temperature is high, the fan will rotate faster, and when the temperature is low, the fan will slow down or even not work. This has the advantages of saving electricity, reducing noise and prolonging the service life of the fan. Generally speaking, the speed of notebook fan can be adjusted by adjusting the power saving mode in COMS settings. There are also some notebooks with complete COMS settings, which can directly set the working temperature and speed of the fan. Some friends think that the notebook fan is noisy, so they always want to stop the fan and adjust the starting temperature of the fan to be very low, which will overheat the CPU and system, lead to a crash and reduce the service life of related accessories, which is not good. Therefore, it is not good that the notebook fan often fails to turn well and does not work. It is not good to master a degree.
The general experience is that when the room temperature is about 20 degrees and the room is well ventilated, the laptop fans of the Internet and Centrino CPU should be started every 20 to 30 minutes and stopped for about five minutes to save energy. When playing games, it starts every ten minutes or so. If the operation has been crazy at ordinary times, it is necessary to check whether there is a problem with the COMS setting or the temperature control circuit.
Fourth, the keyboard-how does it feel?
Notebook keyboard with Chinese logo
Many friends and some media will talk about the keyboard feel of a notebook in the evaluation room. In fact, this is the most difficult sentence to measure. The keyboard stroke of notebook is much shorter than that of ordinary desktop keyboard, which is very uncomfortable in itself. So it doesn't feel very good. Moreover, everyone has different preferences for the elasticity and hardness of keyboard keys, and it is not objective to say how the keyboard feels based on their own experience.
A good notebook keyboard, to do:
1, the gap is enough. Generally, the keyboard of a notebook under 12 inch is often compact, and the distance between keys is very close, which makes typing very uncomfortable.
2, the keys are firm, some bad notebook keyboard keys, when you press one corner, the other corner will even tilt up, so typing is very uncomfortable and the keys are wobbly.
3, the whole is flat, the notebook keyboard is very thin, and accessories such as notebook memory and hard disk are often installed below. Some notebooks have irregular keyboards, some have accessories, and some are empty. In addition, the keyboard itself has a thin steel lining.
When typing, there will be a sinking feeling where there are no accessories below, which is not only uncomfortable, but also a sense of terror when you press it or break it. From a lower angle, you can even see that the keyboard is wavy and uneven. What is even more frightening about this keyboard is that the high temperature of the notebook will make the keyboard swell slightly, but when the computer closes the screen after turning off, the swollen keyboard will not return to its original position, but will rub the LCD screen, causing the LCD screen to be printed with the same scratches as the keyboard layout, which is irreparable and will affect quality assurance. That would have serious consequences.
4. The layout is poor, the notebook keyboard lacks small numeric keys, and the place is compact, so the keyboard layout is different. Some notebook keyboards are unreasonable in design, and some function keys are set everywhere, which is difficult to find and inconvenient to type and use. I used a Toshiba notebook that moved the WIN key to the upper right corner, not to mention how awkward it was.
Fifth, configuration-looking at flowers in the fog.
Notebook configuration sheet with flowers in the fog
Many friends often ask me, what is the memory frequency of a certain notebook, how many hard disk revolutions, what is the motherboard chip and so on. There's really nothing I can do to answer. In the current notebook production, due to the inconsistent arrival dates of accessories from upstream manufacturers and the inability to stop the production line, they are basically assembled with existing accessories on the basis of the configuration that does not violate and is lower than the propaganda commitment. Therefore, if the 4200 rpm hard disk installed for low-end notebooks arrives in advance, the 5400 rpm hard disk installed for high-end notebooks does not arrive, and the high-end notebooks have been put into production and only need hard disks, then the high-end notebooks are installed with 4200 rpm hard disks, while the low-end notebooks in the later period use 5400 rpm high-speed hard disks. So is memory. In this way, the product batch is different and the configuration may change. For notebooks that do not publicly promise hard disk speed, memory frequency and motherboard chipset specifications, manufacturers may make configuration adjustments according to the actual situation, which may be a headache for consumers, but before there is a better solution, they can only try to take the actual spot configuration as the standard. In particular, it is forbidden to listen to the configuration of media evaluation and regard it as the commitment of manufacturers.
Sixth, the battery-how long can it last?
Notebook battery
The battery life of notebook computers is a big problem. If there is no battery, what do we need a laptop for? We might as well buy a desktop LCD computer. What we want is mobility. So what is the standard of battery use? When is it normal to use it for a long time? What is the so-called maximum battery life and standby time? Today's laptops are basically using lithium batteries. Needless to say, the benefits are clear to everyone. The number of battery cells, the configuration of notebook and the situation of power saving mode have great influence on the service life of battery. Generally speaking, the laptop should be able to supply power for more than two hours when the battery is fully activated and running at full speed. It should be noted that the service life of the battery is also seriously affected by the number of battery charges and discharges. Therefore, it is very beneficial to prolong the battery life of notebook computers to minimize the frequent charging and discharging of batteries.
Seven, down frequency-why is it down frequency?
Pentium m processor with Speedstep energy-saving technology
When a friend buys a notebook with a mobile processor, he is often troubled by the problem that the processor often fails to reach the nominal frequency and always runs at a speed lower than the nominal frequency. Some friends think there is something wrong with his notebook. Actually, there is no need to be nervous about this phenomenon. Because the processors of notebook products are different from those of desktop computers, in order to save energy, most of these notebook processors adopt energy-saving technologies such as Intel's "Speedstep" and AMD's "Powernow", and the processors can automatically reduce the frequency of use by analyzing the use status, thus achieving the purpose of energy saving. If the frequency of use is too low, which affects your use, you can turn off the power saving option in the BIOS settings and set the property of the power option to always on, so that even if you use the battery, the processor will run at full speed, and of course the battery life will be shortened. After all, you can't have your cake and eat it.
Eight, invoice-should it?
Notebook purchase invoice
When many friends buy computers, there is a very confusing question, that is, should they need invoices, who should they open them to, and what is the use of invoices. Invoice is a valid purchase certificate issued by the dealer to the buyer when the goods are traded. Similarly, the receipt stamped with the official seal also has legal effect, which can prove the process of commodity trading. The difference is that receipts can be easily bought in stationery stores, or even drawn on a piece of white paper, while invoices are purchased by dealers from tax authorities, and they are used to pay taxes to the state after sales. In other words, it is indeed necessary to pay taxes when issuing invoices to users, and it is possible to evade taxes by issuing white notes or nothing. Some dealers say that they can make a profit without invoicing, which is precisely why. So why are some dealers happy to invoice users, while some dealers prefer not to do business or invoice users? This is mainly determined by the current situation of our national tax system.
Generally speaking, there are two types of invoices:
1. Machine invoice
2. Handwritten invoice
At present, both are formal invoices, and the tax bureau has not unified them! Machines are hard to fake! Handwritten as long as the invoice is stamped with the company's financial seal!
Nine, three guarantees-how to pack?
Warranty Card —— An Important Proof of Three Guarantees
According to the national three-guarantee regulations, notebook products should be returned within 7 days if they fail in use, and replaced within 15 days. The whole machine is guaranteed for one year, and the important parts are guaranteed for 2-3 years. This is a rigid regulation put forward by the state for notebook manufacturers, and also from the perspective of protecting consumers, all domestic enterprises that produce and sell notebooks must abide by it. As long as consumers buy notebook products through proper channels, they all enjoy the national three guarantees policy. Some big brands even provide a three-year warranty for the whole machine they produce, which is very beneficial to protect consumers' investment. After all, there is nothing wrong with the laptop, and the maintenance cost is not a small sum. But it is worth reminding consumers that parallel notebooks are not within the scope of enjoying the national three guarantees.